JP2605617Y2 - Writing implement - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a writing instrument having a mechanism for converting the rotation of a rear shaft into an axial movement.

[0002]

2. Description of the Related Art A conventional writing instrument of this type, for example, a ballpoint pen, can be used only by rotating a rear shaft so that a writing tip is moved in and out in accordance with the rotation direction. After the writing tip, which is separate from the writing tip, is protruded by the rotation of the rear shaft, the center feeding mechanism is operated by a knocking operation so that the core protrudes from the writing tip to be used.

[0003]

In the above-mentioned conventional example, there is a problem that the rotation-axial movement conversion mechanism is complicated in the ballpoint pen. In addition, in the case of a mechanical pencil, not only a rotation-axial movement conversion mechanism, but also a center feed mechanism that operates by knocking operation is required, the structure is complicated, and it is necessary to switch from rotation operation to knocking operation. There is a problem that chipping becomes expensive.

[0004]

In order to solve the above-mentioned problems, a writing instrument according to the present invention is characterized in that a front middle shaft 2 is mounted in a front shaft 1 and a refill 3 is inserted in the front middle shaft 2. A driver 10 having a rear shaft 5 detachably attached to the front shaft 1 or the front center shaft 2 is provided so as to be freely rotatable and immovable in the axial direction,
The refill 3 is fixed to the rear center shaft 4 inserted into the front center shaft 2, and one of the front and rear center shafts 2, 4 extends axially from the rear end 7 A in the axial direction to the terminal end 7 B in the axial front. A slope 8 extending obliquely and a projection 8 sliding on the slope 7 are provided on the other side, and an axial groove 11 and a projection 12 which are fitted to the rear center shaft 4 and the driver 10 are provided .
Open the beginning 7A of the ramp 7 backward through the closed slit 2B.
It is characterized by being released . Claim 2
The idea of the above is that the projecting portions 8 are provided at the start and end portions 7A and 7B of the ramp 7.
In order to enhance the feeling when the fittings and the fittings escape , the starting ends 7A,
It is characterized in that the road width of the ramp 7 is reduced at the end portion 7B . According to the invention of claim 3, the slope 7 is
The first ramp ₇₁ and made from a second ramp 7 _2, the first leading end 7 ₁ A ramp ₇₁ second ramp 7 ₂ source end 7 ₂ A
Characterized by continuously provided a second ramp 7 ₂ to the first opposite side of the ramp ₇₁ so as to. Claim 4
The invention is, ramp 7, the first ramp 7 ₃ consists second ramp 7 _4, the first ramp 7 ₃ of the terminal portion 7 ₃ B second
The so as to ramp 7 ₄ starting end 7 ₄ A 1 ramp 7
₃ and the second ramps 7 _4, characterized in that continuously provided. According to the invention of claim 5 , the starting end 7A of the ramp 7 is closed.
It is characterized by being opened rearward through an open slit 2C in addition to the slit 2B . Furthermore, claim 6
The invention described above is based on friction generating members 13A, 13B that generate a frictional force between the shaft 2 and the driver 10 between them.
Characterized in that it comprises a 13D. Claim 7
Is characterized in that a friction generating member 13C for generating a frictional force between the front center shaft 2 and the rear center shaft 4 is provided between the two.
And

[0005]

[Operation] (In the case of a ballpoint pen) When the rear shaft 5 is rotated, the rear middle shaft 4 and the refill 3 rotate, and the projection 8 of the rear middle shaft 4 protrudes from the starting end portion 7A of the front middle shaft 2 and advances along the slope 7. While writing 3 of Refill 3
Is moved forward, and the writing point 3a of the refill 3 projects from the tip of the front shaft 1 when the projection 8 is fitted into the end portion 7B of the ramp 7. In this state, writing can be performed.

When the rear shaft 5 rotates in the reverse direction, the rear middle shaft 4 and the refill 3 rotate in the reverse direction, and the protrusion 8 of the rear middle shaft 4 protrudes from the terminal end portion 7B of the front middle shaft 2 and moves backward along the slope 7 while the refill 3 is moved. The writing point 3a of the refill 3 is retracted from the tip of the front shaft 1 when the projection 8 is fitted into the starting end 7A of the ramp 7.

(In the case of a mechanical pencil) When the rear shaft 5 is rotated, the rear middle shaft 4 and the refill 3 are rotated, and the refill 3 advances and the refill 3
Press the writing point (the tip or the tip of the slider) 3a
When the protrusion 8 reaches the end 7B of the ramp 7, the writing tip 3a is pushed out from the tip of the tip shaft 1. That is, the ramp 7 is the first
Ramp 7 ₁ and the second consists of ramp 7 _2, the first leading end 7 ₁ A ramp ₇₁ second ramp 7 ₂ starting end 7 ₂
When the second ramp 7 ₂ formed by continuously provided on the opposite side of the first ramp ₇₁ to the A, the projecting portion 8 is first ramp 7 beginning 7 ₁ along ₁ A from by moving between the end portions 7 ₁ B, it is possible to provide a (previously pipes and / or Shinsaki slider) 3a writing destination extrusion, the writing. Further, where projection 8 is fitted to the second ramp 7 ₂ of the terminal portion 7 ₂ B, can hold the pencil chuck open, pushes the writing destination within the front barrel 1 be able to. Further, ramp 7, the first ramp 7 ₃ and the second
Ramp 7 ₄ consists, first ramp 7 ₃ of the terminal portion 7 ₃
The B-to the second ramp 7 ₄ starting end 7 ₄ A 1
Ramp 7 ₃ and when the second ramp 7 ₄ formed by continuously provided is where the protrusion 8 is fitted to the first ramp ₃ terminating unit 7 moves from the starting end portion 7 ₃ A along B The writing tip 3a is extruded from the tip of the tip shaft 1. In this state, the projection 8 is moved to the second slope 7 ₄
By reciprocating between the start end portion 7 ₄ A and the end portion 7 ₄ B, the core can be sent out from the writing destination 3 a and used for writing.

[0008]

FIG. 1 is a longitudinal sectional view showing the configuration of an embodiment of a writing instrument according to the present invention, which is an example adapted to a ballpoint pen. First, the configuration will be described. In FIG. 1, 1 is a front shaft, 2 is a front shaft 1.
The center shaft attached inside the shaft, 16 is a rubber bushing fitted between the front ends of the center shaft 1 and the center shaft 2, 3 is a ballpoint pen refill inserted into the center shaft 2, 2A is a rear end reduction of the center shaft 2 The radial portion, 2a is an annular engaging portion formed on the outer periphery of the rear end reduced diameter portion 2A, and 10 is a projection on the inside of the front portion and the inside of the central portion, respectively, which is engaged with the annular engaging portion 2a of the front shaft 2. 10a and a driver having a plurality of ridges 12 projecting inward.

The projection 10a is inserted between the rear end reduced diameter portion 2A of the front center shaft 2 and the front shaft 1 to engage with the annular engaging portion 2a of the front center shaft 2, and the front shaft 1 and the rear shaft 5 are engaged. The screwdriver 10 is detachably screwed and attached so as to be freely rotatable and immovable in the axial direction. The annular engaging portion 2a and the protrusion 10a may be provided on the driver 10 and the front center shaft 2 respectively, or may be provided on the driver 10 and the front shaft 1 respectively.

The refill 3 is fixed to the rear center shaft 4 inserted into the front center shaft 2. The front center shaft 2 is provided with an inclined hole 7 having both ends formed in the circumferential direction and having start and end portions 7A and 7B, and the rear center shaft 4 is provided with a projection 8 which is slid into the inclined hole 7. The inclined hole 7 and the protruding portion 8 are respectively opposite
And the center shaft 2 may be provided. Start and end portions 7 of inclined hole 7
The hole diameter is reduced in order to enhance the feel when the projection 8 is inserted into and exited from A and 7B. The starting end 7A of the inclined hole 7 is shown in FIG.
As shown in (A), the projection 8 is opened rearward through the closed slit 2B, and the projection 8 is opened from the open end through the closed slit 2B.
Into the pushing start end 7A. In this case, it becomes easy to set the protruding portion 8 to the starting end portion 7A, and the protruding portion 8 is set to the starting end portion 7A.
After being set to, it will not escape backwards. Also, as shown in FIG. 2 (B), the same operation and effect can be obtained even when the start end 7A of the inclined hole 7 is opened rearward through the open and closed slits 2C and 2B.

A large number of axial grooves 1 are formed on the outer periphery of the rear center shaft 4.
A plurality of ridges 12 are provided on the inner periphery of the driver 10 so as to fit into a number of axial grooves 11. It is preferable that the number of the axial grooves 11 be much larger than the number of the ridges 12, since the fitting between them can be further facilitated. The grooves 11 and the ridges 12 in the axial direction may be provided on the driver 10 and the rear middle shaft 4 in the opposite manner, and the number of the grooves 11 and the number of the ridges 12 may be increased by one and reduced by the other. Joint work can be performed quickly.

Next, the operation of the present embodiment having the above configuration will be described. When the rear shaft 5 is rotated, the rear middle shaft 4 and the ballpoint pen refill 3 rotate, and the projection 8 of the rear middle shaft 4 protrudes from the starting end 7A of the front middle shaft 2 and advances along the inclined hole 7 while the ballpoint pen refill 3 is rotated. The writing tip 3a of the ballpoint pen refill 3 projects from the tip of the tip shaft 1 when the writing tip 3a is moved forward and the projection 8 is fitted into the end 7B of the inclined hole 7. In this state, writing can be performed.

When the rear shaft 5 is rotated in the reverse direction, the rear middle shaft 4 and the ballpoint pen refill 3 rotate in the reverse direction, and the projection 8 of the rear middle shaft 4 protrudes from the terminal end portion 7B of the front middle shaft 2 and moves backward along the inclined hole 7. The writing point 3a of the ballpoint pen refill 3 is moved backward,
When the protrusion 8 is fitted into the start end 7A of the inclined hole 7, the writing point 3a of the ballpoint pen refill 3 is retracted from the tip of the tip shaft 1.

FIG. 3 is a longitudinal sectional view showing the construction of another embodiment of the writing instrument according to the present invention which is adapted to a ballpoint pen. In FIG.
This is an example in which an annular engaging member 14 is used instead of the engagement by the annular engaging portion 2a and the protrusion 10a in the embodiment of FIG. Explaining the configuration, an annular groove 2b is provided on the outer periphery of the front middle shaft 2, and an annular engaging member 14 is mounted in the annular groove 2b so as to be rotatable with respect to the front middle shaft 2. On the other hand, a protrusion 10 a is provided near the tip of the driver 10, and the protrusion 10 a is fitted into an annular groove 14 a provided on the outer periphery of the annular engagement member 14. As a result, driver 1
0 operates integrally with the annular engagement member 14, and the driver 10
Is attached to the center shaft 2 so as to be freely rotatable and immovable in the axial direction.

Normally, since the driver 10 is made of metal and the shaft 2 is made of plastic, it is sometimes difficult to mount the two directly rotatably. By using the plastic annular engaging member 14 fixed to the driver 10, the rotation between the driver 10 and the front center shaft 2 can be reliably made free and the axial movement impossible. In the embodiment shown in FIG. 3, the O-ring 13A as a friction generating member is provided in the annular groove 2b adjacent to the annular engaging member 14.
Is provided. The O-ring 13A is
Between the driver 10 and the front center shaft 2 to generate a frictional force. Therefore, when the rear shaft 5 is rotated to move the protrusion 8 along the inclined hole 7, the user is given a sense of weight and stability in the rotation operation,
As a result, a sense of quality can be given. The position of the O-ring is not necessarily limited to the annular groove 2b, but may be arranged on the sliding surface of the driver 10 and the front middle shaft 2 or the front middle shaft 2 and the rear middle shaft 4.

FIGS. 4 to 6 show other examples of the friction generating member. FIG. 4 shows a state in which a washer 13B is installed in the annular groove 2b. The washer 13B urges the annular engaging member 14 rearward in the axial direction, and thereby the rear surface of the annular engaging member 14 and the rear surface of the annular groove 2b. Increase the force acting on the contact surface with
A friction force is generated between these surfaces. A leaf spring or the like may be provided instead of the washer 13B. FIG. 5 shows an example in which a slit 4a and a protrusion 13C are provided in a portion of the rear center shaft 4 inserted into the front center shaft 2. The protrusion 13 </ b> C generates elastic force between the front middle shaft 2 and the rear middle shaft 4 by projecting from the inner surface of the front middle shaft 2 while having elasticity by the slit 4 a. FIG. 6 shows that the projection 1
This is an example in which 3D is provided. The protrusion 13D, while having elasticity by the slit 2D, protrudes from the inner surface of the driver 10 to generate a frictional force between the shaft 2 and the driver 10.

FIG. 7 is a longitudinal sectional view showing another embodiment of the writing instrument according to the present invention, which is an example adapted to a mechanical pencil. The same members as those in the previous embodiment are designated by the same reference numerals and description thereof is omitted. I do. The refill 3 in FIG. 7 includes a writing tip (a tip pipe of a slider) 3a, a slider 3b, a chuck 3c, and a ring 3.
d, chuck spring 3e, cushion spring 3
f and a lead case 3g, and constitutes a known lead feed mechanism. A return spring 15 is disposed from the rear end of the front center shaft 2 to the rear center shaft 4, and urges the rear center shaft 4 rearward in the axial direction with respect to the front center shaft 2.

FIG. 8 is a longitudinal sectional view of another embodiment adapted to a mechanical pencil. The difference from FIG. 7 is that the refill 3 is formed as an integral body including a writing tip (slider tip pipe) 3a, a slider 3b, a chuck 3c, a ring 3d, a chuck spring 3e, and a core case 3g.

Next, FIG. 9 is a diagram showing the relationship between the ramp and the projection in the case of the mechanical pencil shown in FIG. 7, and the arrows in the figure indicate the axial direction of the writing implement. Ramp 7 in FIG. 9 is composed of a first ramp ₇₁ and second ramp 7 _2. The first ramp ₇₁ of the leading end 7 ₁ A second ramp 7 ₂ starting end 7 ₂
Are continuously arranged a second ramp 7 ₂ to the first opposite side of the ramp ₇₁ to the A.

[0020] rotates the shaft 5 back in the above configuration, the rear inner shaft 4 and the pencil for refill 3 is rotated, moving the projection 8 to the first intermediate part 7 ₁ C of the inclined holes _71, Sharp The chuck 3c of the pencil refill 3 advances to perform centering. Further, by rotating the rear shaft 5 against the force of the spring, the projection 8 is moved to the first inclined hole 7.
_{When the} slider 3b is moved until it reaches the _first end portion 7 1B, the writing tip (the tip pipe of the slider) 3a is pushed out from the tip of the tip shaft 1 by the chuck 3c pushing the slider 3b forward. Release the rear shaft 5 and the chuck spring 3
e and the restoring force of the return spring 15, the refill 3 is pushed back axially rearward, and the projection 8 is held at the leading end 7 ₁ A (7
₂ Return to position A). Therefore, writing can be performed in this state. Further, when issuing the core, the core than the previous pipe 3a by reciprocally rotating the rear axle 5 in the first inclined hole 7 ₁ beginning 7 between ₁ A and an intermediate portion ₇₁ C is sent a predetermined length.

The range A shown in FIG.
This is a range in which the core is sent out by a predetermined length at a time, and a range B shown in FIG. 9 is a moving range of the tip pipe 3a. Previously pipe 3a when retracting into the front barrel 1, the rear axle 5 is reversely rotated, the projections 8 second inclined hole 7 _second end portion 7 ₂ B
To fit. In this state, when the front pipe 3a is pushed toward the front shaft 1, the chuck 3c is held in a state where the core is opened, so that the front pipe 3a can move in the axial direction and the front shaft 1
Is stored inside. FIG. 10 is a diagram showing the relationship between the ramp and the protrusion in the case of the mechanical pencil in FIG.
A first ramp 7 ₃ consists second ramp 7 _4, first the first ramp 7 ₃ of the terminal portion 7 ₃ B to the second starting end 7 ₄ A ramp 7 ₄ The first ramp 7 ₃ and the second ramp 7
₄ are connected in series.

In the above configuration, when the rear shaft 5 is rotated, the rear center shaft 4 and the mechanical pencil refill 3 are rotated.
Press 3a (previous pipe slider) that writing destination by advancing pencil for refill 3, protrusion 8 is written from the tip of the front barrel 1 where fitted into the first inclined hole 7 ₃ of the terminal portion 7 ₃ B The tip 3a is extruded and held. From this state, rear shaft 5
Can be subjected to a second chuck 3c is reciprocated by a reciprocating rotation between the inclined hole 7 ₄ starting end 7 ₄ A and the end portion 7 ₄ B sends the core from the writing destination 3a writing.

Note that the range A shown in FIG.
The range B shown in FIG. 10 is a range in which the core is sent out by a predetermined length from the writing point 3a. In the embodiments of FIGS. 7 to 10 described above, the writing tip 3a has been described with the tip of the slider as the writing tip. However, in the case of a fixed mechanical pencil without the tip of the writing tip, the writing tip 3a is used.
The core corresponds to a. In this case, the ramp 7 in FIG. 9 may be formed from the starting end portions 7 ₁ A to 7 ₁ C, and by moving the projection 8 back and forth between the leading end portions 7 A and 7 C, the writing tip 3 a is sent out by a predetermined length. Is done. Incidentally, the same time second ramp 7 ₂ (leading end 7 ₂ A, the terminal end 7 ₂ B)
Is provided, the protrusion 8 can be fitted into the terminal end 7 ₂ B to hold the chuck in an open state, and the core 3a can be pushed into the front shaft 1, so that when the core is stored, Operation is convenient. In the present invention, the inclined path 7 may be an inclined hole as shown in the figure, but may be an inclined groove. Further, when the protrusions 8 are fitted into and removed from the start and end portions 7A and 7B of the ramp 7, a high feel can be obtained because they pass through the reduced road width. However, in the case of the second ramp 7 ₂ of the terminal portion 7 ₂ B in FIG. 9, it is necessary to return to the leading end 7 ₂ A, it is preferable not to change the path width.

In the present invention, not only a ballpoint pen but also a ramp can be used by adopting a rotation-axial direction conversion mechanism that uses a ramp having both ends as a start and an end and a projection that slides on the ramp. Can be moved to and from the writing point, and the lead-in operation from the writing point can be performed only by rotating the mechanical pencil, so that the structure can be simplified, and it can be implemented easily with excellent simplicity and low cost. Become.

[0025]

As described above, according to the present invention, a driver 10 to which the rear shaft 5 is detachably attached is provided on the front shaft 1 and the front center shaft 2 so as to be freely rotatable and non-movable in the axial direction. A writing tool in which a refill 3 is inserted into a rear center shaft 4 inserted into the rear center shaft 2 and provided with an axial groove 11 and a ridge 12 which are mutually fitted into the rear center shaft 4 and a driver 10; , 4 provided on one of the two sides, a ramp 7 having both ends as starting and terminating sections 7A, 7B, and a rotating-axial movement converting mechanism 6 provided with a projection 8 provided on the other side and sliding on the ramp 7. not only ballpoint pen with a simple structure by employing a ramp 2 Danren設(7 ₁ and 7 ₂ or 7 ₃ and 7 ₄₎ doing, infested writing destination by the rotation operation in pencil , Can perform various operations such as centering operation from the writing destination, simplifying the structure It can be inexpensively implemented excellent flight properties. In addition, the starting end 7A of the ramp 7 is connected through the closed slit 2B.
So that the protrusion 8 is
It is easy to set the start end 7A, and the projection 8 is attached to the start end 7A.
After being set to A, it will not escape backward
Has the effect.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a configuration of an embodiment of a writing instrument according to the present invention.

FIG. 2A is an explanatory diagram showing a configuration of a main part of one embodiment shown in FIG. 1, and FIG. 2B is an explanatory diagram showing a configuration of a main part of another example.

FIG. 3 is a longitudinal sectional view showing a configuration of another embodiment of the writing instrument of the present invention.

FIG. 4 is a sectional view showing another example of the friction generating member of the writing instrument of the present invention.

5A is a front view of a main part of a rear center shaft showing another example of the friction generating member of the writing instrument of the present invention, and FIG. 5B is a sectional view of FIG.

FIG. 6 is a front view of a main part of a front center shaft showing another example of the friction generating member of the writing instrument of the present invention.

FIG. 7 is a longitudinal sectional view showing a configuration of another embodiment of the writing instrument of the present invention.

FIG. 8 is a longitudinal sectional view showing a configuration of another embodiment of the writing instrument of the present invention.

9 is a partially developed view of a front center shaft showing a relationship between a ramp and a protrusion in the embodiment of FIG. 7;

FIG. 10 is a partially developed view of a front center shaft showing a relationship between a ramp and a protrusion in the embodiment of FIG. 8;

[Explanation of symbols]

1 front barrel 2 info center shaft 2A rear reduced diameter portion 2a annular engagement portion 2B closed slit 2C open slit 3 refill 4 after the center pole 5 after the shaft 6 rotation - axial movement conversion mechanism 7 ramps 7A beginning 7B terminating unit 7 ₁ first ramp 7 ₁ a starting end 7 ₁ B terminal end 7 ₂ second ramp 7 ₂ a starting end 7 ₂ B terminal end 7 ₃ first ramp 7 ₃ a starting end 7 ₃ B terminating unit 7 ₄ second ramp 7 ₄ a starting end 7 ₄ B terminal portion 8 projecting portion 10 driver 10a projection 11 axial groove 12 ridges 13 friction generating member

Continuing from the front page (72) Inventor Tadayoshi Ebinuma 138 Kurei, Kawagoe-shi, Saitama Pref. Inside Kotobuki Kawagoe Plant (56) References REAL WORKS 59-56087 (JP, U) (58) Fields surveyed ( Int.Cl. ⁷ , DB name) B43K 24/06 B43K 21/16 B43K 24/18

Claims (7)

(57) [Scope of request for utility model registration] 1. A front shaft (2) is mounted inside a front shaft (1),
A refill (3) is inserted into the front shaft (2), and a driver (10) with a rear shaft (5) removably attached to the front shaft (1) and the front middle shaft (2) is freely rotatable. The refill (3) is fixed to the rear center shaft (4) inserted into the front center shaft (2), and is fixed to the rear center shaft (2, 4). A ramp (7) extending obliquely with respect to the axis from the start end (7A) to the terminal end (7B) in the axial front is provided, and a projection (8) is provided on the other side to slide on the ramp (7). An axial groove (11) and a ridge (12) are provided for the central shaft (4) and the driver (10) to be fitted to each other, and the starting end (7A) of the ramp (7) is inserted through a closed slit (2B). Writing implement characterized by being open to the rear. 2. The start and end portions (7A, 7A) of the ramp (7).
The width of the ramp (7) at the start and end (7A, 7B) is reduced in order to enhance the feel when the projection (8) is inserted into and exited from the projection (B). Writing implement. 3. The ramp (7) comprises a first ramp (7 ₁ ).
When the second ramp consists (7 _2), the first ramp ₍₇₁₎
Beginning of beginning of (7 ₁ A) a second ramp (7 ₂₎ (7
The second on the other side of the first ramp so that the ₂ A) (7 ₁₎
The writing implement according to any one of claims 1 and ₂ , wherein the ramps (7 ₂ ) are continuously provided. 4. The ramp (7) comprises a first ramp (7 ₃ ).
And the second ramp (7 ₄ ), and the first ramp (7 ₃ )
Of the second ramp (7 ₄ ) to the beginning (7 ₃ B) of the second ramp (7 ₄ ).
₄ first ramp so that the A) (7 ₃₎ and a second ramp (7 ₄₎ is formed by continuously provided to Claim 1 or 2 of the writing instrument according to any one. 5. The ramp (7) according to claim 1, wherein a starting end (7A) of the ramp (7) is opened rearward through an opening slit (2C) in addition to the closing slit (2B).
Writing implement according to any of the above. 6. A friction generating member (13) for generating a frictional force between the center shaft (2) and the driver (10).
A, 13B, 13D), the writing implement according to any one of claims 1, 2, and 5, wherein 7. A friction generating member (13C) for generating a frictional force between the front middle shaft (2) and the rear middle shaft (4). Writing implement according to any of the above.